a legal status granted to non-citizens of the U.S. who have met certain requirements of the Immigration Service, allowing them to live and work permanently in the U.S. and to enter the country without a visa.

of, relating to, or designating the last geological period of the Paleozoic Era, from approximately 280 million to 220 million years ago, when reptiles became prominent, major mountain ranges such as the Appalachians formed, and great glaciers appeared in the Southern Hemisphere. [2 definitions]